diff options
author | Peter Maydell <peter.maydell@linaro.org> | 2014-02-08 14:46:56 +0000 |
---|---|---|
committer | Peter Maydell <peter.maydell@linaro.org> | 2014-02-08 14:46:56 +0000 |
commit | effa8e06435e6a47a3a21e50fd638b6fb29e616a (patch) | |
tree | 4b2fc094f5375ab2da7e2ecb673f142ce3a77be2 /target-arm/translate-a64.c | |
parent | c0b2b5fa3651caff0b33621583a3709a8875e85f (diff) |
target-arm: A64: Add SIMD simple 64 bit insns from scalar 2-reg misc
Implement the simple 64 bit integer operations from the SIMD
scalar 2-register misc group (C3.6.12): the comparisons against
zero, plus ABS and NEG.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-arm/translate-a64.c')
-rw-r--r-- | target-arm/translate-a64.c | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 323d5b3ab7..dd6785a349 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -6212,6 +6212,48 @@ static void disas_simd_scalar_three_reg_same(DisasContext *s, uint32_t insn) tcg_temp_free_i64(tcg_rd); } +static void handle_2misc_64(DisasContext *s, int opcode, bool u, + TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +{ + /* Handle 64->64 opcodes which are shared between the scalar and + * vector 2-reg-misc groups. We cover every integer opcode where size == 3 + * is valid in either group. + */ + TCGCond cond; + + switch (opcode) { + case 0xa: /* CMLT */ + /* 64 bit integer comparison against zero, result is + * test ? (2^64 - 1) : 0. We implement via setcond(!test) and + * subtracting 1. + */ + cond = TCG_COND_LT; + do_cmop: + tcg_gen_setcondi_i64(cond, tcg_rd, tcg_rn, 0); + tcg_gen_neg_i64(tcg_rd, tcg_rd); + break; + case 0x8: /* CMGT, CMGE */ + cond = u ? TCG_COND_GE : TCG_COND_GT; + goto do_cmop; + case 0x9: /* CMEQ, CMLE */ + cond = u ? TCG_COND_LE : TCG_COND_EQ; + goto do_cmop; + case 0xb: /* ABS, NEG */ + if (u) { + tcg_gen_neg_i64(tcg_rd, tcg_rn); + } else { + TCGv_i64 tcg_zero = tcg_const_i64(0); + tcg_gen_neg_i64(tcg_rd, tcg_rn); + tcg_gen_movcond_i64(TCG_COND_GT, tcg_rd, tcg_rn, tcg_zero, + tcg_rn, tcg_rd); + tcg_temp_free_i64(tcg_zero); + } + break; + default: + g_assert_not_reached(); + } +} + /* C3.6.12 AdvSIMD scalar two reg misc * 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0 * +-----+---+-----------+------+-----------+--------+-----+------+------+ @@ -6220,7 +6262,50 @@ static void disas_simd_scalar_three_reg_same(DisasContext *s, uint32_t insn) */ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) { - unsupported_encoding(s, insn); + int rd = extract32(insn, 0, 5); + int rn = extract32(insn, 5, 5); + int opcode = extract32(insn, 12, 5); + int size = extract32(insn, 22, 2); + bool u = extract32(insn, 29, 1); + + switch (opcode) { + case 0xa: /* CMLT */ + if (u) { + unallocated_encoding(s); + return; + } + /* fall through */ + case 0x8: /* CMGT, CMGE */ + case 0x9: /* CMEQ, CMLE */ + case 0xb: /* ABS, NEG */ + if (size != 3) { + unallocated_encoding(s); + return; + } + break; + default: + /* Other categories of encoding in this class: + * + floating point (single and double) + * + SUQADD/USQADD/SQABS/SQNEG : size 8, 16, 32 or 64 + * + SQXTN/SQXTN2/SQXTUN/SQXTUN2/UQXTN/UQXTN2: + * narrowing saturate ops: size 64/32/16 -> 32/16/8 + */ + unsupported_encoding(s, insn); + return; + } + + if (size == 3) { + TCGv_i64 tcg_rn = read_fp_dreg(s, rn); + TCGv_i64 tcg_rd = tcg_temp_new_i64(); + + handle_2misc_64(s, opcode, u, tcg_rd, tcg_rn); + write_fp_dreg(s, rd, tcg_rd); + tcg_temp_free_i64(tcg_rd); + tcg_temp_free_i64(tcg_rn); + } else { + /* the 'size might not be 64' ops aren't implemented yet */ + g_assert_not_reached(); + } } /* C3.6.13 AdvSIMD scalar x indexed element |